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if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'plantuml') == -1
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal indentexpr=GetPlantUMLIndent()
setlocal indentkeys=o,O,<CR>,<:>,!^F,0end,0else,}
" only define the indent code once
if exists("*GetPlantUMLIndent")
finish
endif
let s:incIndent =
\ '^\s*\%(loop\|alt\|opt\|group\|critical\|else\|legend\|box\|if\|while\)\>\|' .
\ '^\s*ref\>[^:]*$\|' .
\ '^\s*[hr]\?note\>\%(\%("[^"]*" \<as\>\)\@![^:]\)*$\|' .
\ '^\s*title\s*$\|' .
\ '^\s*skinparam\>.*{\s*$\|' .
\ '^\s*\%(state\|class\|partition\|rectangle\|enum\|interface\|namespace\)\>.*{'
let s:decIndent = '^\s*\%(end\|else\|}\)'
function! GetPlantUMLIndent(...) abort
"for current line, use arg if given or v:lnum otherwise
let clnum = a:0 ? a:1 : v:lnum
if !s:insidePlantUMLTags(clnum)
return indent(clnum)
endif
let pnum = prevnonblank(clnum-1)
let pindent = indent(pnum)
let pline = getline(pnum)
let cline = getline(clnum)
if cline =~ s:decIndent
if pline =~ s:incIndent
return pindent
else
return pindent - shiftwidth()
endif
elseif pline =~ s:incIndent
return pindent + shiftwidth()
endif
return pindent
endfunction
function! s:insidePlantUMLTags(lnum) abort
call cursor(a:lnum, 1)
return search('@startuml', 'Wbn') && search('@enduml', 'Wn')
endfunction
endif
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